You could get an account with Twilio to send SMS messages. Write a script in whichever language you prefer to ping their Messaging API at a given interval with a random task for them to deliver to your phone
The app Due on iOS and apple watch is good.
> When someone tells me to do something I drop everything and do it.
Note that you'll likely want to buy a book or coaching sessions to help you learn about setting boundaries and building relationships with people who are okay with you sometimes saying "no" to their requests for effort. At a certain point, managing tasks requires having fewer tasks.
Send yourself an email/note taking apps/Google sheets to SMS/Pushover/iOS shortcuts. Automation FTW! https://pipedream.com
I have been adding longer-term regular todos to my phone calendar, for example:
- changing furnace filters - cleaning the car's leather seats every 3 months (got that one today)
Wunderlist or Todoist -> Zapier -> Twilio might be a quick solution. Might be worth a try
If you're on Android and want to try something akin to SMS without going through Twilio, is using ntfy[0]. By sending POST messages to an endpoint, you can send yourself phone notifications. Set up a script on your server or wherever to send them at timed intervals or however you want. Made by someone here on HN
Edit: noticed there's now an iOS app in progress
[0]: https://ntfy.sh/